Electric-light fixture.



J. 0. GILL.

ELECTRIC LIGHT FIXTURE.

APPLlCATION FILED NOV. 7. I917.

Patented June 18, 1918.

UITE

JOHN ORWEN GILL, OF BARNESBORO, PENNSYLVANIA.

ELECTRIC-LIGHT FIXTURE.

Specification of Letters Patent.

Patented June 18, 1918.

Application filed November 7, 1917. Serial No. 200,818.

To all whom it may concern:

Beit known that I, JOHN Oawnn GILL, a citizen of the United States,residing at Barnesboro, in the county of Cambria and State ofPennsylvania, have invented certain new and useful Improvements inElectric- Light Fixtures,of which the following is a specification,reference being had to the accompanying drawings.

This invention relates to an improved electric light fixture, and hasfor its primary object to provide a fixture which is particularlydesigned for use in mines, subways, tunnels, basements, and like placesWhere the socket and the electric light bulb require a guard orprotection.

* It is anotherand more particular object of my invention to provide afixture for the above purpose, embodying a hood or housing having meansfor the-connection of the same to an expansible bolt fixed in the wallor ceiling, and means for attaching a bulb guard to the housing wall.

It is also'a further general object of my inventionto provide a fixtureas above characterized, which is quite simple and inexpensive in itsconstruction, highly convenient and serviceable in practical use, andmay be manufactured and installed at relatively small cost;

With the above and other objects-in view, my invention consists inthenovel features of construction, combination, and arrangement of parts tobe hereinafter more fully described, claimed, and illustrated in theaccompanying drawing, in which,

Figure 1 is a side elevation illustrating one embodiment of theinvention;

Fig. 2 is a bottom plan view of the socket housing;

. Fig. 3 is a vertical sectional view through the fixture;

Fig. 4 is a bottom plan view illustrating a slightly modified form ofthe housing; and

Fig. 5 is a side elevation, partly in section, illustrating anothermanner of mounting the fixture and a different form of the guard for thelight bulb.

Referring in detail to the drawing, and more particularly to Figs. 1, 2and 3 thereof, 5 designates the housing for the bulb socket, preferablyconstructed of metal, and which may be of any desired form in plan. Thishousing is opened at one end and provided upon its al ith an inwardlyextending flange (5 having spaced keyhole slots 7 formed therein. To thewall 8, at the other end of the housing 5 and upon the inner facethereof, the bulb receiving socket member 1) is suitably secured. Thisend wall 8 of the housing is further provided centrally thereof with adownwardly projecting boss 10 having a threaded bore extending throughthe end wall 8 and designed to receive the threaded shank of a boltindicated at 11. This bolt may be any one of the several well knowntypes of expansible bolts and is adapted to be anchored at its other endin the ceiling or wall of the mine corridor or passage.

In the side wall of the housing 5, at diametrically opposite points,suitable rubber bushings 12 are arranged to insulate the wires 13 fromthe housing wall, said wires being connected to the respective contactterminals of the bulb socket in the usual manner. In lieu of thebushings 12, a single pipe or conduit may be threaded into the housingwall through which the wires 13 can be extended.

The bulb shown at B has the usual threaded plug at one end forengagement in the socket member 9, and for this bulb a suit able guardis provided. This guard, as herein shown, consists of spaced. parallel,metal bars or rods 14: rigidly fixed to each other at one of their endsby the plate 1.5; These bars are also connected and braced at spacedpoints by means oi? lhe metal rings 16. The other end of each bar llofthe guard is threai'led to receive a nut 17 and a head 18 is providedupon the terminal of this threaded end of the bar. In connecting theguard to the housing, it will be understood that the heads 18 areadapted to be engaged through the enlarged ends of the keyhole slots 7and said guard then turned to dispose the threaded shanks of the bars 14in the narrower ends of the slots. The nuts 17 are finally adjusted intotight clamping engagement against the flange 6, whereby the guard issecurely held in connection with the housing. In this manner, it will beseen that the lamp bulb is protected against possible breakage by beingaccidentally struck.

In Fig. 4, I have illustrated a slightly modified form of the devicewherein the hood or housing is of rectangular form in plan, and to theend wall thereof at opposite sides of the bulb socket, the fusesindicated at 19 are secured. It is apparent, of course, that a singlefuse may be used in connection with each housing if desired. It

21 which is threaded intothe boss 10. The

outer wall of the housing is'provided adjacent to the open end of thehousing with an internal, annular shoulder 22, the thick ness of thehousing wall being reduced and such reduced portion threaded to receiveone end of a glass globe 23 disposed over the electric light bulb B.Preferably, a packing ring 24: of asbestos, is disposed between the endof this globe and the shoulder 22. Thus, any possibility of fire orsparks escaping from the housing when the flue blows out or the lamp,bulb breaks, is obviated. This form, of the device is particularlydesigned for use in mines and. other places where gas may accumulate andwhich might possibly be ignited from such cause.

From the foregoing description, taken in connection with theaccompanying drawing, the construction, manner of operation, and

several advantages of the described forms of my invention will beclearly and fully understood. The device as a whole is relativelysimple, highly convenient and serviceable in practical use, and may becheaply manufactured and installed. Many other variations of theinvention than those above explained are, of course, possible, and it istherefore to be understood that while I have herein specifically setforth. several practical constructions of the device, the same isnevertheless susceptible of still further modifications in the form,proportion, and arrangement of its several detail features with outdeparting from the spirit or sacrificing drawing, I have shown a any ofthe advantages of the invention as claimed.

Having thus fully described my invention, whatI desire'to claim andsecure by Letters Patent is 1. An electric light fixture including ahousing open at one end, a bulb socket fixed within the housing to theoppositeend there-' of, the bodywall of said housing being provided withopenings on opposite sides thereof through which circuit wires extendfor connection to said socket, a lamp bulb guard and means for.detachably connecting the guard to the open endof the housing, and meanson the closed endof the housing.- for the connection of said housing toa support ing bolt whereby the housing, the. lamp bulb.

and the guard may be removedas-a unit from connection with said boltwithout disconnecting the socket.

2. An electric light fixture including a housing open at one end andhaving a wall at its other'end provided with-a central,

circuit wires from the bulb outwardly projecting boss havinga threadedbore adapted to receive the shank of an attaching bolt, a bulb socketfixed to the inner face of said wall, the housing..wall at its open endhaving an inwardly. projecting .fiange, said flange being -provided withspaced keyhole slots therein, a lamp bulb guard having spaced barsprovided-with threaded end portions terminating-in enlarged heads, saidheads being adapted for en agement through the enlargejdends of 1 therespective keyhole. slots, whereby the J. H. WIILIAMS, WILLIAM F. DELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner-of latents,

' Washington, I). 0.

